Swiftlink Technologies Inc.

Min-Yu Huang

Abhijit Bhattacharya

Ayman Eltaliawy

Srinaga Nikhil Nallandhigal

Thomas Chen

Robert Hill

An amplifier includes a first and a second differential input ports, and a single-ended output port. The amplifier includes a first and a second transistors, each having a gate, source, and drain terminals. The source terminals are coupled to a reference plane and the gate terminals are coupled to the respective first and second differential input ports. The amplifier includes a Balun having a primary and a secondary transformer winding, the primary transformer winding having one end coupled to the drain terminal of the first transistor, an opposite end coupled to the drain terminal of the second transistor, and a center tap coupled to a bias voltage, and the secondary transformer winding is adjacent to the primary transformer winding and having one end coupled to the single-ended output port and an opposite end open circuited. An electromagnetic field generated at the primary induces a signal at the secondary transformer winding.

Transformer-based Marchand Balun amplifier for wireless communication

According to one embodiment, an RF front end includes an antenna array that is attached to a PCB. A structure is attached to the PCB. The structure has a plurality of concentric rings to enclose an antenna array on the PCB. Each of the plurality of concentric rings has a vertical portion attached to a ground plane of the PCB through a substrate of the PCB, and a planar strip attached to the vertical portion at an end that is opposite of the ground plane.

Periodic mode-selective structure for surface wave scattering mitigation in millimeter wave antenna arrays

An antenna apparatus includes a substrate, antenna elements on the substrate, and surface wave filtering structures on the substrate. Each surface wave filtering structure is operable to decouple surface wave coupling between adjacent antenna elements of the antenna elements.

Ultra wideband isolation for coupling reduction in an antenna array

A frequency tripler circuit includes an amplifier to receive a balanced input signal at an input frequency and outputs a balanced signal at a second harmonic of the input frequency. The frequency tripler circuit includes a passive double balanced mixer coupled to an output of the amplifier to receive the balanced signal at the second harmonic and the balanced input signal to generate an output balanced signal having a frequency triple the input frequency.

Self mixing frequency doubler tripler circuits for wireless communication

According to one embodiment, a transformer-based in-phase and quadrature (IQ) includes a differential balun having a first inductor and a second inductor. The first inductor has a first input terminal and a first output terminal. The second inductor has a second input terminal and a second output terminal. Additionally, the IQ generator circuit includes a third inductor magnetically coupled with the first inductor. The third inductor has a first isolation terminal and a third output terminal. The IQ generator circuit also includes a fourth inductor magnetically coupled with the second inductor. The fourth inductor has a second isolation terminal and a fourth output terminal. The IQ generator circuit additionally includes a first transistor coupled to the first input terminal of the first inductor. Further, the generator circuit includes a second transistor coupled to the second input terminal of the second inductor. The first transistor, the second transistor, the first inductor, and the second inductor form a part of a differential amplifier.

Transformer-based current-reuse amplifier with embedded IQ generation for compact image rejection architecture in multi-band millimeter-wave 5G communication

A transmit in-phase quadrature (IQ) amplifier includes a common gain stage to receive an input signal and to generate an amplified signal. The amplifier includes an IQ poly-phase filter coupled to the common gain stage to receive the amplified signal from the common gain stage and outputs a four-phase signal. The amplifier includes an in-phase (I) phase switching gain stage coupled to the IQ poly-phase filter to receive I components of the four-phase signal and outputs an amplified phase switching I signal. The amplifier includes a quadrature (Q) phase switching gain stage coupled to the IQ poly-phase filter to receive Q components of the four-phase signal and outputs an amplified phase switching Q signal.

Inphase quadrature current selector amplifiers for wireless communication

An antenna includes a first radiating arm comprising a first radiating element having a first outer edge, and a second radiating arm that is arranged orthogonally on the first radiating arm and separated from the first radiating arm in a first direction, the second radiating arm comprising a second radiating element having a second outer edge. The first outer edge of the first radiating element extends substantially parallel to the second outer edge of the second radiating element.

Wideband wide-beamwidth polarization diverse antenna

A folded Marchand Balun includes a first, a second, a third port, and a first transmission line being folded into a first and second intermediate transmission lines, the first intermediate transmission line disposed on a first signal plane and electrically connected through metal vias to the second intermediate transmission line disposed on a second signal plane. The first transmission line has one end as the first port and an opposite end as an open circuit. The Balun includes a second transmission line disposed on the first signal plane and is adjacent to the first intermediate transmission line. The second transmission line has one end as the second port and an opposite end grounded. The Balun includes a third transmission line disposed on the second signal plane and adjacent to the second intermediate transmission line. The third transmission line has one end as the third port and an opposite end grounded.

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Richmond, Canada

Min-Yu Huang